S
M
T
W
T
F
S
26
87°
69°
27
86°
68°
28
84°
73°
29
85°
67°
30
88°
70°
1
88°
71°
2
92°
73°
3
82°
75°
4
83°
75°
5
85°
76°
6
85°
80°
7
85°
77°
8
87°
79°
9
86°
78°
10
87°
80°
11
86°
79°
12
88°
76°
13
85°
77°
14
86°
78°
15
86°
77°
16
87°
75°
17
83°
74°
18
83°
76°
19
84°
77°
20
84°
77°
21
85°
76°
22
84°
77°
23
85°
76°
24
84°
77°
25
84°
77°
26
85°
78°
27
87°
78°
28
85°
77°
29
84°
78°
30
85°
77°
31
84°
78°
1
83°
78°
2
85°
77°
3
85°
77°
4
86°
76°
5
85°
78°
6
84°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Key Largo
Key Largo's May 2026 forecast shows daily high temperatures ranging from 82° to 88°, with overnight lows between 74° and 80°. The average high for May is 85° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Key Largo. See also: June | July | August.
